From the course: Learning Modular Synthesis
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The voltage controlled low-pass filter (VCF)
From the course: Learning Modular Synthesis
The voltage controlled low-pass filter (VCF)
- Next in our common subtractive synthesizer patch is the filter. What the filter does is remove, or filter out, some of the harmonics coming from your oscillators. The most common filter is the low pass filter. What it does is pass, untouched, the lower frequencies or harmonics, then at a certain point, starts to remove some of the higher harmonics. That magic point is called the corner, or cutoff frequency, and we're going to explore changing the cutoff and its effect on the sound in this movie. The next few movies after this one, we're going to play around with different filter shapes and different filter slopes. And play around with filter resonance. Actually adding to the strength of some harmonics. We're getting ahead of ourselves. Let's dive into filter cutoff first. I'm going to take one of our waveform outputs, I'm going to start with sawtooth since it has the most harmonics and the strongest harmonics, and take it into the filter input. And I already have it's input slide up…
Contents
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Patching a typical synthesizer “voice”9m 3s
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(Locked)
Tuning voltage-controlled oscillators (VCOs)8m 48s
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(Locked)
The basic analog waveforms6m 23s
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(Locked)
Sine waves and drum sounds8m 36s
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(Locked)
Digital wavetable oscillators10m 19s
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(Locked)
The voltage controlled low-pass filter (VCF)8m 30s
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(Locked)
The difference between filter slopes7m 45s
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(Locked)
Filter resonance (feedback)7m 50s
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(Locked)
Other common filter modes (HP, BP, and Notch)9m 13s
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(Locked)
Envelope types (ADSR, AD, AR, and DADSR)8m 44s
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(Locked)
Linear vs. exponential envelope shapes7m 59s
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(Locked)
Low-frequency oscillator (LFO) waveshapes4m 14s
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(Locked)
Pulse width modulation (PWM)3m 7s
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(Locked)
Vibrato with LFO sync and delay4m 30s
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(Locked)
Tremolo and voltage-controlled amplifiers (VCAs)4m 52s
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(Locked)
Some alternate modulation sources4m 13s
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